Table 2. Validity of ADA as a diagnostic test.

Cases	Sensitivity % (CI)	Specificity % (CI)	PPV % (CI)	NPV (%) (CI)	LR+ (CI)	LR− (CI)
Confirmed TB pleuritis (n = 72)	94 (86–98)	95 (82–99)	97 (89–99)	90 (76–97)	18.9 (4.9–73	0.06 (0.02–0.15)
Clinical TB (n = 125)	94 (88–97)	95 (82–99)	98 (93–100)	84 (70–93)	18.9 (4.9–73.0)	0.06 (0.03–0.12)
Total TB Pleuritis (n = 197)	94 (90–97)	95 (82–99)	99 (96–100	77.5 (63–88)	18.9 (4.9–72.9)	0.06 (0.03–0.10)

PPV = positive predictive value; NPV = negative predictive value; CI = 95% confidence interval; LR+ = positive likelihood ratio; LR− = negative likelihood ratio.